Which of the following is NOT a type of target identified in classification?

The classification of targets in military contexts typically includes categories that are directly relevant to conventional land and air operations. Tanks, personnel carriers, and rotary wing aircraft are often specific types of military assets that ground forces are trained to engage. Each of these categories plays a distinct role on the battlefield, which is why they are recognized targets for classification purposes.

A nuclear submarine, on the other hand, does not fit into the standard classification types encountered in typical engagement scenarios for ground forces or air operations. Submarines are naval assets, and while they are indeed significant military targets, they are primarily associated with naval operations rather than the direct land engagement or aerial attack that the other options represent. Thus, it is classified differently and not as a target type typically included in the classification relevant to ground forces or close air support. This distinction is key in understanding target classification and ensures that focus remains on applicable surface and aerial threats.